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docs(otel): tighten inject_trace_context docstring

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Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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yucheng 2026-09-16 07:33:39 +00:00
parent 05ededf8a0
commit 8899583d06
1 changed files with 4 additions and 6 deletions
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10
litellm/integrations/otel/plumbing/context.py
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@ -325,13 +325,11 @@ def _outgoing_trace_context(parent_span: object) -> Context | None:
def inject_trace_context(headers: Mapping[str, str], parent_span: object = None) -> dict[str, str]:
"""``headers`` plus W3C ``traceparent``/``tracestate`` for the current request's span.
"""``headers`` plus W3C ``traceparent``/``tracestate`` for this request's span.
Parent preference: the request span auth stashed on the key (the legacy
``litellm_request`` SERVER span, or the FastAPI server span under otel_v2), then
the anchored request root span, then the ambient active span. Only trace context
is injected, never Baggage, so per-request identity baggage cannot leak upstream.
Unchanged when no valid span context exists anywhere.
Parent preference: ``parent_span`` (the request span auth stashed on the key), then
the anchored request root span, then the ambient active span. Only trace context is
injected, never Baggage. Unchanged when no valid span exists anywhere.
"""
context: Final = _outgoing_trace_context(parent_span)
if context is None: